- Oregon State Agricultural College. Agricultural Experiment Station25
- Forest Products Laboratory (U.S.)15
- Bullis, D. E. (Deloss Everett), 1894 19845
- Oregon State Agricultural College. Extension Service5
- Hartman, Henry, 1889 4
- Childs, Leroy, 1888 3
- Hyslop, G. R. (George Robert), 1884 3
- Oregon Agricultural College. Extension Service3
- Oregon State College. Agricultural Experiment Station3
- Schoth, H. A. (Harry August), 1891 3
- Selby, H. E. (Halbert Edgerton), 1896 3
- Truax, T. R. (Thomas Roy), 1886 3
- Brouse, Don2
- Browne, F. L. (Frederick Lincoln), 1895 2
- Fox, F. E. (Frank Elmer), 1889 2
- Mote, Don C. (Don Carlos), 1887 2
- Price, F. E. (Frederick Earl), 1898 2
- Robinson, R. H. (Reginald Heber), 1886 2
- Schuster, C. E. (Carl Ephraim), 1889 2
- Scudder, H. D. (Henry Desborough), 1881 2